I need to change the hole of this pinion [
www.thingiverse.com] to 4mm hole.
I can import the STL file of the pinion file into SketchUp 8.0 and scale it down for proper dimension. I then make a thin wall tube liner that has the outer diameter of 5mm, and the inner diameter of 4mm. The problem now is I cannot seem to find the center of the hole inside the pinion so that I can align the center of the tube I just make to the center of the pinion.
I activated all the extensions that come with Sketup8 but just couldn't find any plug in that find the center of the pinion.
Anyone has any suggestion on how I can do this?
Thanks very much
-Thanh
